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A136884
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Numbers n such that n and the square of n use only the digits 0, 2, 3, 4 and 7.
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1
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0, 2, 20, 200, 2000, 20000, 200000, 2000000, 4740332, 20000000, 27204302, 47403320, 200000000, 272043020, 474033200, 2000000000, 2702734302, 2720430200, 4477474032, 4740332000, 20000000000, 27027343020, 27204302000, 44774740320, 47227474032, 47403320000, 200000000000, 270273430200, 272043020000, 447747403200
(list; graph; refs; listen; history; internal format)
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